Vacuum cleaner



FIG. 1 is a right-side perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top, left-side, front perspective view thereof;

FIG. 4 is a left-side elevational view thereof; and,

FIG. 5 is a front elevational view thereof. 

The ornamental design for a vacuum cleaner, as shown. 